US5154168A - Respirator mask - Google Patents

Respirator mask Download PDF

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Publication number
US5154168A
US5154168A US07/685,443 US68544391A US5154168A US 5154168 A US5154168 A US 5154168A US 68544391 A US68544391 A US 68544391A US 5154168 A US5154168 A US 5154168A
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US
United States
Prior art keywords
mask
mask body
openings
respirator
connection
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
US07/685,443
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English (en)
Inventor
Joachim Schlobohm
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Draegerwerk AG and Co KGaA
Original Assignee
Draegerwerk AG and Co KGaA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Draegerwerk AG and Co KGaA filed Critical Draegerwerk AG and Co KGaA
Assigned to DRAGERWERK AKTIENGESELLSCHAFT, MOISLINGER ALLEE 53-55, D-2400 LUBECK, GERMANY reassignment DRAGERWERK AKTIENGESELLSCHAFT, MOISLINGER ALLEE 53-55, D-2400 LUBECK, GERMANY ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: SCHLOBOHM, JOACHIM
Application granted granted Critical
Publication of US5154168A publication Critical patent/US5154168A/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62B—DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
    • A62B9/00—Component parts for respiratory or breathing apparatus
    • A62B9/04—Couplings; Supporting frames
    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62B—DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
    • A62B18/00—Breathing masks or helmets, e.g. affording protection against chemical agents or for use at high altitudes or incorporating a pump or compressor for reducing the inhalation effort
    • A62B18/08—Component parts for gas-masks or gas-helmets, e.g. windows, straps, speech transmitters, signal-devices

Definitions

  • the present invention pertains to a respirator mask with connection openings for filters and a mask body, which is designed as a full mask or a half mask.
  • a respirator mask with a mask body designed as a full mask has become known from West German Patent Specification No. DE-PS 17,08,046.
  • This prior art respirator mask comprises a mask body with connection openings for filters and flutter valves and an internal half mask.
  • the mask body is designed such that its shape, or the form in which it is manufactured, does not have to be changed when the connection ports for the filters or the flutter valves are to be installed. To achieve this, the mask body has desired points when needed and used to connect one or several filters or one or several flutter valves as desired.
  • a defined respirator mask configuration is manufactured such that a single-piece mask body without openings is first prepared, recesses are subsequently punched through in the desired positions, and filters and/or flutter valves are fastened at the connections thus formed.
  • One drawback of the prior-art respirator mask is that the field of application of the respirator mask, e.g., as a single-filter respirator mask or as a two-filter respirator mask, is defined by the openings, once punched. Conversion to another respirator mask configuration is possible only if connecting ports that are no longer needed are closed by auxiliary parts. If, for example, a two-filter respirator mask with one flutter valve is converted into a single-filter respirator mask, an additional flutter valve must be inserted in place of the second filter, or a separate closing plug must be placed into the connection opening in the mask body.
  • the prior art respirator mask involves the risk that recesses will be inadvertently punched through during the use of the respirator, and the respirator mask will therefore no longer be suitable for use because of the leak developed.
  • a half mask with connection openings for fastening filters and flutter valves has become known from West German Utility Patent No. DE-GM 16,25,097.
  • two filters are arranged on the side of the half mask, and the flutter valve is located on the front side of the half mask in front of the mouth.
  • only one filter is to be inserted into the connection opening of the flutter valve, and the breathing air is allowed to flow off via a rubber lip valve on the underside of the half mask. The lateral connection openings are closed in this state.
  • a connecting adapter with connecting ports can be fastened on the full mask or half mask in at least two preferred positions.
  • Various numbers of filters can be connected in the overlapping areas, and the non-overlapping connection openings are closed with sealing means provided on the connecting adapter.
  • the essential advantage of the present invention relates to the fact that different respirator mask configurations can be realized with the connecting adaptor.
  • This connecting adaptor is fastened in different preferred positions on the respirator mask, and defines connecting ports, into which connection openings filters can be inserted. At least one of the connecting ports are overlapped or aligned with connection openings on the respirator mask in each preferred position of the connecting adapter. Auxiliary parts for closing unused connection openings are not necessary, because these are closed with sealing means provided on the connecting adapter.
  • the connecting ports in the connecting adapter are provided either as circular openings in the wall of the connecting adapter or as threaded bushings or plug-in type sockets.
  • Such a connecting adapter can be fastened either in a respirator mask with a full mask and internal mask or directly on a half mask.
  • connection openings are circular openings in the full mask.
  • annular sealing beads may be provided on the inside of the connecting adapter. The sealing beads prevent respiration gas from escaping from the overlapping areas into the atmosphere.
  • the connecting adapter may also be designed as a changeover switch which is fastened on the full mask or is even part of the full mask and can be brought into the corresponding preferred position by rotating.
  • the connecting adapter is directly attached to the half mask, and the filters are buttoned into the half mask. Since the half mask usually consists of a rubber-elastic material, the sealing function is assumed at the same time by the buttoning.
  • the respirators are usually used as single-filter and two-filter respirator masks.
  • a single-filter respirator mask can be realized in a first preferred position, and a two-filter respirator mask can be realized in a second preferred position.
  • the filter is fastened on the front side of the connecting adapter at the level of the mouth, whereas in the case of the two-filter respirator mask, the filters are arranged on the side flanks of the connecting adapter. Filters of identical design can be used for both configurations of the respirator mask, i.e., the single-filter respirator mask and the two-filter respirator mask.
  • the connecting adapter is designed such that it surrounds the side flanks of the half mask or of the full mask and is designed to hold the filters.
  • the connecting adapter is preferably made from a solid material and serves as a support for the half mask, because it is in contact with the elastic side flanks in a U-shaped pattern. Since the intrinsic weight of the filters is taken up completely by the connecting adapter, the half mask can be designed for exclusive sealing function and be manufactured from a soft, pliant material, e.g., silicone.
  • the connecting adapter for a half mask is provided with bands to fasten the respirator mask on the respirator user's head. Due to the uniform introduction of the holding force over the front side and the side flanks of the half mask, uniform pressing against the face is achieved.
  • the connecting adapter On the side facing the respirator mask, the connecting adapter is provided with closing plugs serving as sealing means, which can be buttoned into the non-overlapping connection openings and seal same. Buttoning in brings about reliable closure of the connection openings and does not lead to leakage even in the case of extreme deformation of the respirator mask.
  • pit-like, rectangular recesses which serve to center the filters and to secure them against rotation, are provided in the area of the connecting ports.
  • the filters have a matching counterpart, which extends into the recess and is designed such that the filter can be fastened on the connecting adapter only in a defined position. Subsequent adjustment of the filter on the connecting adapter to achieve favorable wearing position for the respirator's user is no longer necessary.
  • FIG. 1 is a side view of a respirator mask with one filter according to the invention
  • FIG. 2 is a longitudinal view of the respirator mask according to FIG. 1;
  • FIG. 3 shows a sectional view of a detail from FIG. 2 taken along line A--A;
  • FIG. 4 is a respirator mask according to FIGS. 1 through 3 with the connecting adapter replugged to fasten two filters;
  • FIG. 5 is a front view of a respirator mask as a full mask with two filters.
  • FIG. 6 is a sectional view of a respirator mask as a full mask with two filters.
  • FIG. 1 shows the side view of a respirator mask 20 with a half mask 1 made from a rubber-elastic material, a connecting adapter 2 made from a solid material, one filter 3, a band 17, and a flutter valve 5.
  • the respirator mask 20 is of symmetrical design; therefore, only one half is shown in FIGS. 1, 2, and 4. Symmetric components are designated by the same reference numerals with the suffix "a" added.
  • the connecting adapter 2 is placed onto the half mask 1 in a first preferred position, and in this position, it permits a single filter 3 to be fastened.
  • the connecting adapter 2 surrounds, in the shape of a U, the elastic half mask 1, and the connecting adapter thus acts as a support for its side flanks.
  • two connecting ports 4, 4a are provided as circular openings in the wall of the connecting adapter 2.
  • the second connecting adapter 4a is located on the rear side and is not shown in FIG. 1.
  • the connecting adapter 2 In the lower area of the connecting adapter 2, there are two closing plugs 7, 7a, which are provided on the inside of the connecting adapter 2 and point toward the half mask 1.
  • the band 17 is guided in an oval eye 18, and can be adapted to the head of a respirator user (not shown) by displacement in the vertical direction.
  • FIG. 2 shows a vertical section through the respirator mask 20 according to FIG. 1.
  • the half mask 1 of FIG. 2 has two closed connection openings 8, 8a and one filter connection opening 9.
  • the connection openings 8, 8a, 9 are openings provided in the rubber-elastic wall of the half mask 1.
  • the connection openings 8, 8a are sealed with the closing plugs 7, 7a, which are part of the connecting adapter 2.
  • the filter 3 is buttoned into the filter connection opening 9 of the half mask 1.
  • the filter 3 is held in the filter connecting port 10 and is centered by a filter recess 11 of the connecting adapter 2.
  • the filter connecting port 10 is designed as a circular opening in the wall of the connecting adapter 2.
  • a matching counterpart of the filter 3 engages in the rectangular, pit-like filter recess 11, thus holding the filter 3 in the predetermined position.
  • a filter closing plug 12 which extends into a filter recess 13 of the half mask 1 is provided on the inside.
  • Corresponding recesses 14, 14a are provided on the side flanks of the half mask 1.
  • the half mask 1 also has a circumferential sealing bead 21, which is in contact with the face of the respirator user (not shown).
  • a directional valve 22 is provided to interrupt the flow of gas through the filter 3 during breathing out. The expired gas thus can escape only through the flutter valve 5.
  • FIG. 3 shows a sectional view of a detail from FIG. 2 along line A--A, in which the symmetrically arranged connection openings 8, 8a and closing plugs 7, 7a are recognizable.
  • the filter 3 consists of a screw type housing 15, into which a filter cartridge 16 with a gasket 19 is inserted. To change the filter, the housing 15 is screwed on, and the filter cartridge is replaced. It is not necessary to button the filter 3 out of the filter connection opening 9.
  • FIG. 4 shows a respirator mask 20 with a connecting adapter 2, which is placed onto the half mask 1 in a second preferred position, and permits the connection of two filters 3 in this position.
  • the conversion from the single-filter respirator mask according to FIGS. 1 through 3 to a two-filter respirator mask according to FIG. 4 is carried out by first buttoning the filter 3 and the closing plugs 7, 7a out of the connection openings 8, 8a, 9 (FIG. 3).
  • the connecting adapter 2 is subsequently pulled off of the half mask 1, turned through 180° around a horizontal axis, and put back in place.
  • the filter connecting port 10 is opposite the filter recess 13, and the closing plugs 7, 7a extend into the recesses 14, 14a (FIG. 2 and FIG. 4). Since the sides of the connecting adapter 2 are now inverted relative to the half mask 1, the closing plug 7a is now in the recess 14 and the closing plug 7 is in the recess 14a.
  • the filter connection opening 9 is sealed with the filter closing plug 12.
  • the connecting ports 4, 4a overlap the connection openings 8, 8a of the half mask 1, and two filters 3 can be inserted here. These filters 3 are not shown in FIG. 4.
  • the filters 3 are centered on the connecting adapter 2 via the recesses 6, 6a.
  • Filters 3 of identical design can be used for both configurations of the respirator mask, i.e., as a single-filter respirator mask or as a two-filter respirator mask.
  • FIG. 5 shows the front view of a respirator full mask 30 with a mask body designed as a full mask 36.
  • a connecting adapter 32, two filters 33, 33a, a band 47, and a flutter valve 35 are connected to the full mask 36.
  • the full mask 36 has connection openings 38, 38a (FIG. 6) and one filter connection opening 39, which are designed as circular openings in the wall of the full mask 36.
  • the connecting adapter 32 is placed onto the full mask 36 in a second preferred position, and it permits two filters 33, 33a to be fastened in this position. In the lower area of the connecting adapter 32, two connecting ports 34, 34a are provided to accommodate the filters 33, 33a.
  • a filter connecting port 40 is located in the upper area, and is used with one centrally arranged filter in the first preferred position.
  • the connecting ports 34, 34a, 40 are designed as threaded bushes.
  • FIG. 6 shows a sectional view of the respirator full mask 30 according to FIG. 5.
  • the direction of gas flow is indicated by arrows.
  • the gas enters via the connecting ports 34, 34a, the connection openings 38, 38a, and the directional valves 351, 352, sweeps over the lens 43, and enters the interior space of the inner mask 31 via a check valve 44.
  • the exhaled air is discharged into the atmosphere via the flutter valve 35.
  • the connecting adapter 32 In the second preferred position of the connecting adapter 32 with one filter, there is an equivalent gas pathway.
  • the connecting adapter 32 is provided with circumferential sealing beads 45, 45a, which seal the overlapping areas against the atmosphere.
  • the two-filter respirator full mask is converted into a single-filter respirator full mask by pulling off the connecting adapter 32 and putting it back in a position rotated through 180°.
  • the closing plugs 37, 37a are in the connection openings 38, 38a, and the filter connecting port 40 overlaps the filter connection opening 39.
  • the connecting ports 34, 34a, 40 shown here are designed for screw type connection of the filters 33, 33a; however, it is also possible to use plug connection.
  • Filters 33, 33a of identical design can be used for both configurations, i.e., as a single-filter respirator mask or as a two-filter respirator mask.

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  • Health & Medical Sciences (AREA)
  • Pulmonology (AREA)
  • General Health & Medical Sciences (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Respiratory Apparatuses And Protective Means (AREA)
US07/685,443 1990-05-30 1991-04-15 Respirator mask Expired - Fee Related US5154168A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4017336A DE4017336C1 (de) 1990-05-30 1990-05-30
DE4017336 1990-05-30

Publications (1)

Publication Number Publication Date
US5154168A true US5154168A (en) 1992-10-13

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ID=6407449

Family Applications (1)

Application Number Title Priority Date Filing Date
US07/685,443 Expired - Fee Related US5154168A (en) 1990-05-30 1991-04-15 Respirator mask

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US (1) US5154168A (de)
EP (1) EP0459123B1 (de)
DE (2) DE4017336C1 (de)

Cited By (28)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5353789A (en) * 1991-11-21 1994-10-11 Dragerwerk Ag A flaccid mask with straps and a supporting element that force the mask into sealing engagement with the wearer's face in response to force exerted by the straps on the supporting element
US5372130A (en) * 1992-02-26 1994-12-13 Djs&T Limited Partnership Face mask assembly and method having a fan and replaceable filter
US5540998A (en) * 1991-02-08 1996-07-30 Nippon Steel Chemical Co. Ltd. Solar heat-shielding coating composition and coated structure
US5669375A (en) * 1995-09-21 1997-09-23 Dragerwerk Aktiengesellschaft Breathing mask
US5782235A (en) * 1996-03-05 1998-07-21 Dragerwerk Ag Valved filter connection piece for a gas mask
US20030217752A1 (en) * 2002-03-27 2003-11-27 Rudiger Muller Connection component for a respirator product
US20040079373A1 (en) * 2001-10-12 2004-04-29 Yamamoto Kogaku Co., Ltd. Respiration protecting apparatus
US20060237013A1 (en) * 2003-09-25 2006-10-26 Kwok Philip R Ventilator mask and system
US20070289592A1 (en) * 2004-03-19 2007-12-20 Scott Health & Safety Ltd. Respirators
US20100065058A1 (en) * 2008-09-18 2010-03-18 Moldex-Metric, Inc. Full face respirator mask
US20110083670A1 (en) * 2009-10-12 2011-04-14 Walacavage Alexander J Breathing apparatus and associated methods of use
US8517017B2 (en) 2009-01-08 2013-08-27 Hancock Medical, Inc. Self-contained, intermittent positive airway pressure systems and methods for treating sleep apnea, snoring, and other respiratory disorders
US20140216474A1 (en) * 2013-02-01 2014-08-07 3M Innovative Properties Company Respirator negative pressure fit check devices and methods
US8919344B2 (en) 2011-02-08 2014-12-30 Hancock Medical, Inc. Positive airway pressure system with head position control
US9492691B2 (en) 2012-09-14 2016-11-15 Dräger Safety AG & Co. KGaA Directional valve and respirator product with a directional valve
USD776802S1 (en) 2015-03-06 2017-01-17 Hancock Medical, Inc. Positive airway pressure system console
US9808657B2 (en) 2011-09-17 2017-11-07 Dräger Safety AG & Co. KGaA Directional valve and breathing mask with a directional valve
USD816209S1 (en) 2016-03-28 2018-04-24 3M Innovative Properties Company Respirator inlet port connection seal
USD827810S1 (en) 2016-03-28 2018-09-04 3M Innovative Properties Company Hardhat suspension adapter for half facepiece respirators
USD842982S1 (en) 2016-03-28 2019-03-12 3M Innovative Properties Company Hardhat suspension adapter for half facepiece respirators
US10314989B2 (en) 2013-01-28 2019-06-11 Hancock Medical, Inc. Position control devices and methods for use with positive airway pressure systems
US10632009B2 (en) 2016-05-19 2020-04-28 Hancock Medical, Inc. Positional obstructive sleep apnea detection system
US10881829B2 (en) 2014-08-18 2021-01-05 Resmed Inc. Portable pap device with humidification
US11020619B2 (en) 2016-03-28 2021-06-01 3M Innovative Properties Company Multiple chamber respirator sealing devices and methods
US11052268B2 (en) 2013-02-01 2021-07-06 3M Innovative Properties Company Respirator negative pressure fit check devices and methods
US11219787B2 (en) 2016-03-28 2022-01-11 3M Innovative Properties Company Respirator fit check sealing devices and methods
WO2022173448A1 (en) * 2021-02-10 2022-08-18 Anil Tiwari Method for concentrating oxygen inside a mask
US11992078B2 (en) 2016-03-28 2024-05-28 3M Innovative Properties Company Headwear suspension attachment element

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6062221A (en) † 1997-10-03 2000-05-16 3M Innovative Properties Company Drop-down face mask assembly
ITPS20010028A1 (it) 2001-11-15 2003-05-15 Cl Com Advanced Tecnology Srl Maschera intera filtrante per la protezione degli agenti biologici
DE102020111399A1 (de) 2020-04-27 2021-10-28 Fritz Schmitt Atemschutzmaske

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1708046A1 (de) * 1967-06-10 1971-04-22 Draegerwerk Ag Atemschutzmaske
US4579113A (en) * 1984-04-23 1986-04-01 Parmelee Industries, Inc. Disposable covers for respirators
US4630604A (en) * 1985-04-09 1986-12-23 Siebe North, Inc. Valve assembly for a replaceable filter respirator

Family Cites Families (3)

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FR851087A (fr) * 1939-03-02 1940-01-02 Joint revolver porte cartouches filtrantes pour masques à gaz
DE1625097U (de) * 1951-03-27 1951-06-28 Friedrich Schleich Staubschutzhalbamaske.
US4850346A (en) * 1986-10-20 1989-07-25 Wgm Safety Corp. Respirator

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1708046A1 (de) * 1967-06-10 1971-04-22 Draegerwerk Ag Atemschutzmaske
US4579113A (en) * 1984-04-23 1986-04-01 Parmelee Industries, Inc. Disposable covers for respirators
US4630604A (en) * 1985-04-09 1986-12-23 Siebe North, Inc. Valve assembly for a replaceable filter respirator

Cited By (46)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5540998A (en) * 1991-02-08 1996-07-30 Nippon Steel Chemical Co. Ltd. Solar heat-shielding coating composition and coated structure
US5353789A (en) * 1991-11-21 1994-10-11 Dragerwerk Ag A flaccid mask with straps and a supporting element that force the mask into sealing engagement with the wearer's face in response to force exerted by the straps on the supporting element
US5372130A (en) * 1992-02-26 1994-12-13 Djs&T Limited Partnership Face mask assembly and method having a fan and replaceable filter
US5669375A (en) * 1995-09-21 1997-09-23 Dragerwerk Aktiengesellschaft Breathing mask
US5782235A (en) * 1996-03-05 1998-07-21 Dragerwerk Ag Valved filter connection piece for a gas mask
US20040079373A1 (en) * 2001-10-12 2004-04-29 Yamamoto Kogaku Co., Ltd. Respiration protecting apparatus
US6854464B2 (en) * 2001-10-12 2005-02-15 Yamamoto Kogaku Co., Ltd. Respiration protecting apparatus
US20030217752A1 (en) * 2002-03-27 2003-11-27 Rudiger Muller Connection component for a respirator product
US7093596B2 (en) * 2002-03-27 2006-08-22 Dräger Safety AG & Co. KGaA Connection component for a respirator product
US8375944B2 (en) 2003-09-25 2013-02-19 Resmed Limited CPAP mask and system
US10549057B2 (en) 2003-09-25 2020-02-04 ResMed Pty Ltd CPAP mask and system
US20060237013A1 (en) * 2003-09-25 2006-10-26 Kwok Philip R Ventilator mask and system
US20100108070A1 (en) * 2003-09-25 2010-05-06 Resmed Limited Ventilator mask and system
US7913692B2 (en) * 2003-09-25 2011-03-29 Resmed Limited CPAP mask and system
US8844524B2 (en) 2003-09-25 2014-09-30 Resmed Limited CPAP mask and system
US9586016B2 (en) 2003-09-25 2017-03-07 Resmed Limited CPAP mask and system
US10166417B2 (en) 2004-03-19 2019-01-01 Scott Health & Safety Ltd. Respirator having an integrated oronasal mask
US20070289592A1 (en) * 2004-03-19 2007-12-20 Scott Health & Safety Ltd. Respirators
US9132299B2 (en) * 2004-03-19 2015-09-15 Scott Health & Safety Limited Respirator having an integrated oronasal mask
US20100065058A1 (en) * 2008-09-18 2010-03-18 Moldex-Metric, Inc. Full face respirator mask
US8517017B2 (en) 2009-01-08 2013-08-27 Hancock Medical, Inc. Self-contained, intermittent positive airway pressure systems and methods for treating sleep apnea, snoring, and other respiratory disorders
US10112025B2 (en) 2009-01-08 2018-10-30 Hancock Medical, Inc. Self-contained, intermittent positive airway pressure systems and methods for treating sleep apnea, snoring, and other respiratory disorders
US20110083670A1 (en) * 2009-10-12 2011-04-14 Walacavage Alexander J Breathing apparatus and associated methods of use
US9180267B2 (en) 2011-02-08 2015-11-10 Hancock Medical, Inc. Positive airway pressure system with head position control
US8925546B2 (en) 2011-02-08 2015-01-06 Hancock Medical, Inc. Positive airway pressure system with head position control
US8919344B2 (en) 2011-02-08 2014-12-30 Hancock Medical, Inc. Positive airway pressure system with head position control
US9808657B2 (en) 2011-09-17 2017-11-07 Dräger Safety AG & Co. KGaA Directional valve and breathing mask with a directional valve
US9492691B2 (en) 2012-09-14 2016-11-15 Dräger Safety AG & Co. KGaA Directional valve and respirator product with a directional valve
US10314989B2 (en) 2013-01-28 2019-06-11 Hancock Medical, Inc. Position control devices and methods for use with positive airway pressure systems
US11052268B2 (en) 2013-02-01 2021-07-06 3M Innovative Properties Company Respirator negative pressure fit check devices and methods
US9950202B2 (en) * 2013-02-01 2018-04-24 3M Innovative Properties Company Respirator negative pressure fit check devices and methods
AU2014212793B2 (en) * 2013-02-01 2016-08-18 3M Innovative Properties Company Respirator negative pressure fit check devices and methods
US20140216474A1 (en) * 2013-02-01 2014-08-07 3M Innovative Properties Company Respirator negative pressure fit check devices and methods
US10881829B2 (en) 2014-08-18 2021-01-05 Resmed Inc. Portable pap device with humidification
US11813385B2 (en) 2014-08-18 2023-11-14 Resmed Inc. Portable pap device with humidification
USD776802S1 (en) 2015-03-06 2017-01-17 Hancock Medical, Inc. Positive airway pressure system console
US11020619B2 (en) 2016-03-28 2021-06-01 3M Innovative Properties Company Multiple chamber respirator sealing devices and methods
USD827810S1 (en) 2016-03-28 2018-09-04 3M Innovative Properties Company Hardhat suspension adapter for half facepiece respirators
USD842982S1 (en) 2016-03-28 2019-03-12 3M Innovative Properties Company Hardhat suspension adapter for half facepiece respirators
US11219787B2 (en) 2016-03-28 2022-01-11 3M Innovative Properties Company Respirator fit check sealing devices and methods
USD816209S1 (en) 2016-03-28 2018-04-24 3M Innovative Properties Company Respirator inlet port connection seal
US11865375B2 (en) 2016-03-28 2024-01-09 3M Innovative Properties Company Respirator fit check sealing devices and methods
US11992078B2 (en) 2016-03-28 2024-05-28 3M Innovative Properties Company Headwear suspension attachment element
US10632009B2 (en) 2016-05-19 2020-04-28 Hancock Medical, Inc. Positional obstructive sleep apnea detection system
US11660228B2 (en) 2016-05-19 2023-05-30 Oura Health Oy Positional obstructive sleep apnea detection system
WO2022173448A1 (en) * 2021-02-10 2022-08-18 Anil Tiwari Method for concentrating oxygen inside a mask

Also Published As

Publication number Publication date
DE59100682D1 (de) 1994-01-20
EP0459123A1 (de) 1991-12-04
EP0459123B1 (de) 1993-12-08
DE4017336C1 (de) 1991-06-13

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